Which Is the Correct Distinction Between a Heterotroph and an Autotroph

Which is the correct distinction between a heterotroph and an autotroph?

A) An autotroph utilizes organic compounds as a carbon source and a heterotroph uses carbon dioxide as a carbon source.
B) An autotroph utilizes carbon dioxide as a carbon source and a heterotroph utilizes organic compounds as a carbon source.
C) An autotroph utilizes complex organic compounds as a carbon source and a heterotroph utilizes simple organic compounds as a carbon source.
D) An autotroph utilizes carbon dioxide as an energy source and a heterotroph utilizes organic compounds as an energy source.
E) an autotroph utilizes organic compounds as an energy source and a heterotroph utilizes carbon dioxide as an energy source .